A. On polished surfaces
B. On rough surfaces
C. In the absence of agitation
D. None of these
A. Feed
B. Depth of liquid over heating surface
C. Pressure difference between steam chest and vapour space
D. All A., B. and C.
A. Increasing temperature of the vapour
B. Decreasing temperature of the vapour
C. Increasing viscosity of the film of condensate
D. Increasing temperature drop
A. Average
B. Geometric mean
C. Product
D. Sum
A. Q ∝ T2
B. Q ∝ T4
C. Q ∝ T3
D. None of these
A. Parallel
B. Mixed
C. Counter flow
D. Same in either A , B. or C.
A. Radiation
B. Natural convection
C. Forced convection
D. Conduction